90 lines
2.8 KiB
Python
Executable file
90 lines
2.8 KiB
Python
Executable file
#!/usr/bin/python3
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import os
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import json
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import argparse
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from docker import Client
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from graphviz import Graph
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def generate_graph(verbose: bool, file: str):
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dot = Graph(comment='Docker Network Graph',
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graph_attr=dict(rankdir="TB", packmode='graph', pack='true')
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)
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docker_client = Client(os.environ.get("DOCKER_HOST", "unix:///var/run/docker.sock"))
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def dump_json(obj):
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print(json.dumps(obj, indent=4))
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for c in docker_client.containers():
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name = c['Names'][0]
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container_id = c['Id']
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node_id = 'container_%s' % container_id
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iface_labels = []
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for net_name, net_info in c['NetworkSettings']['Networks'].items():
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label_iface = "<%s> %s" % (net_info['EndpointID'], net_info['IPAddress'])
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iface_labels.append(label_iface)
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if verbose:
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print('|'.join(iface_labels))
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dot.node(node_id,
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shape='record',
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label="{ %s | { %s } }" % (name, '|'.join(iface_labels)),
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fillcolor='#ff9999',
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style='filled')
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for net in docker_client.networks():
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net_name = net['Name']
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try:
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gateway = net['IPAM']['Config'][0]['Gateway']
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except IndexError:
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gateway = None
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try:
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subnet = net['IPAM']['Config'][0]['Subnet']
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except IndexError:
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subnet = None
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if verbose:
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print("Network: %s %s gw:%s" % (net_name, subnet, gateway))
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net_node_id = "net_%s" % (net_name,)
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net_label_html = '<br/>'.join([s for s in ['<font color="#777777"><i>network</i></font>', net_name, subnet, gateway] if s is not None])
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dot.node(net_node_id,
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shape='record',
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label="{<gw_iface> %s| %s }" % (gateway, net_name),
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fillcolor='#99ff99',
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style='filled')
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for container_id, container in sorted(net['Containers'].items()):
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if verbose:
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dump_json(container)
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if verbose:
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print(" * ", container['Name'], container['IPv4Address'], container['IPv6Address'])
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container_node_id = 'container_%s' % container_id
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container_iface_ref = "%s:%s" % (container_node_id, container['EndpointID'])
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dot.edge(container_iface_ref, net_node_id+":gw_iface")
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print(dot.source)
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if file:
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dot.render(file)
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(description="Generate docker network graph.")
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parser.add_argument("-v", "--verbose", help="Verbose output", action="store_true")
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parser.add_argument("-o", "--out", help="Write output to file", type=str)
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args = parser.parse_args()
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generate_graph(args.verbose, args.out)
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